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GROWFS(8) FreeBSD System Manager's Manual GROWFS(8)
NAMEgrowfs - expand an existing UFS file system
SYNOPSISgrowfs [-Ny] [-ssize] special | filesystemDESCRIPTION
The growfs utility makes it possible to expand an UFS file system.
Before running growfs the partition or slice containing the file system
must be extended using gpart(8). If you are using volumes you must
enlarge them by using gvinum(8). The growfs utility extends the size of
the file system on the specified special file. The following options are
available:
-N ``Test mode''. Causes the new file system parameters to be
printed out without actually enlarging the file system.
-y ``Expert mode''. Usually growfs will ask you if you took a
backup of your data before and will do some tests whether special
is currently mounted or whether there are any active snapshots on
the file system specified. This will be suppressed. So use this
option with great care!
-ssize
Determines the size of the file system after enlarging in
sectors. Size is the number of 512 byte sectors unless suffixed
with a b, k, m, g, or t which denotes byte, kilobyte, megabyte,
gigabyte and terabyte respectively. This value defaults to the
size of the raw partition specified in special (in other words,
growfs will enlarge the file system to the size of the entire
partition).
EXAMPLES
Expand root file system to fill up available space:
growfs /
Resize /dev/ada0p1 partition to 2GB and expand the file system:
gpart resize -i 1 -s 2G ada0
growfs -s 2G /dev/ada0p1
SEE ALSOdumpfs(8), ffsinfo(8), fsck(8), fsdb(8), gpart(8), newfs(8), tunefs(8)HISTORY
The growfs utility first appeared in FreeBSD 4.4. The ability to resize
mounted file systems was added in FreeBSD 10.0.
AUTHORS
Christoph Herrmann <chm@FreeBSD.org>
Thomas-Henning von Kamptz <tomsoft@FreeBSD.org>
The GROWFS team <growfs@Tomsoft.COM>
Edward Tomasz Napierala <trasz@FreeBSD.org>
CAVEATS
When expanding a file system mounted read-write, any writes to that file
system will be temporarily suspended until the expansion is finished.
BUGS
Normally growfs writes cylinder group summary to disk and reads it again
later for doing more updates. This read operation will provide
unexpected data when using -N. Therefore, this part cannot really be
simulated and will be skipped in test mode.
FreeBSD 11.0-PRERELEASE November 20, 2014 FreeBSD 11.0-PRERELEASE